Last updated: 2026-09-05 · 5 min read

An injection mold quotation is not a price — it is a set of engineering decisions with numbers attached. Read it correctly and you can verify every decision before money moves; read it as a single figure and you are buying the decisions blind. The line items are the product: steel grades, mold base brand, action counts, finish levels, trial counts, what is included and what is quietly excluded. This article walks a quotation line by line — what each line should say, what a vague version of that line hides, and how to compare two quotations without comparing apples to a fruit basket.

Key facts

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  • A quotation you can verify is itemized: mold base, cavity and core steels, actions, hot runner, finish, trials, terms — each on its own line with a brand, grade or count.
  • Steel grade by component is the line that drives tool life; “P20” on one quote and “H13” on another are not the same tool at different prices.
  • Surface finish lines must reference the standard and the area covered — a finish level without a scope is an invitation to disagreement.
  • Trial counts and included samples define how many correction cycles you have already paid for; “unlimited free trials” usually means trials were never seriously counted.
  • The lowest figure on the table is rarely the lowest total cost; exclusions, weak lines and missing scopes surface later as change orders.

    • What a verifiable quotation looks like

    A quotation built for engineering review has a shape: every physical thing the tool contains appears as a line with a name, a specification and a quantity. Mold base with brand and size. Cavity and core steels with grades — separate lines, because they wear differently and fail differently. Actions — sliders, lifters, unscrewing or collapsible cores — counted individually, because each one is a mechanical subsystem with its own cost and its own failure modes. Hot runner with brand and zone count. Surface finish referencing a standard with an area of coverage. Trials counted. Samples, gauges, spares, terms — each visible. The discipline is simple to state: if a line cannot be verified after the tool is built, it was not a specification; it was a hope. And the quotation is where hopes get converted into specifications or quietly discarded.

    The lines, one by one

    Mold base. Should state brand and series (LKM, HASCO, DME standard or equivalent), plate sizes, and steel of the plates. Vague version: “standard mold base included.” What it hides: whose standard, in what steel, with what guiding — the difference between a base that holds alignment for the tool’s life and one that revisits the question at shot fifty thousand.
    Cavity and core steels. Should state grade per component — the steel grade decision belongs to the part’s resin, volume and abrasiveness, and the quotation should show it was made deliberately. Vague version: “high-grade tool steel.” What it hides: everything — P20 and H13 and S136 sit at different price points and different lifespans, and “high-grade” has been applied to all of them.
    Actions and mechanisms. Should count sliders, lifters and any special mechanics individually. Vague version: “mechanisms as required.” What it hides: the count is the cost, and an uncounted mechanism is one that will be quoted again later as a change order when the design review finds it.
    Hot runner / runner system. Should state brand, zone count, nozzle type — or the cold-runner design with runner layout. Vague version: “hot runner system included.” What it hides: brand tier and zone granularity, which decide temperature control quality and which spares the program marries for a decade.
    Surface finish. Should reference the standard and scope — the tool class line and the finish callouts per surface, with areas. Vague version: “polished finish.” What it hides: polish is priced by level and by square centimeter; a level without a scope is a negotiation scheduled for the worst possible week — the one before shipment.
    Trials and samples. Should state how many trials are included, on what press class, with how many samples per trial and what documentation accompanies them. Vague version: “trials included.” What it hides: whether “included” means one shot at parameters of the shop’s choosing, or a documented sequence with reports — the difference the trial discipline makes visible.
    Gauges, spares and consumables. Should list checking fixtures if needed, spare inserts, seals and heater sets. Vague version: absent entirely. What it hides: nothing — absence is the finding; these items surface later at emergency-procurement prices.
    Payment terms and delivery. Should state milestone structure and what each milestone buys, plus shipping basis. Vague version: a single percentage split with no deliverables attached. What it hides: the risk map — which is why the milestone-for-deliverable structure deserves its own full treatment.

    Red flags between the lines

  • One number, zero lines. A lump sum is not automatically dishonest, but it is automatically unverifiable — and unverifiable is where budgets go to be renegotiated upward.
  • “Unlimited free trials and corrections.” Generosity this open usually prices trials at zero effort — meaning the trial findings will be met with the cheapest interpretation available.
  • Steel stated only where it is impressive. Cavity steel named, core steel unnamed; or the reverse. The unnamed component is where grade substitutions happen.
  • Exclusions longer than inclusions. A quotation whose exclusion list outguns its scope is a menu, not a quotation — every excluded item returns as a future invoice.
  • No mention of documentation. Drawings, reports, CMM data — if the quotation does not promise them, the project plans to survive without them, and the acceptance conversation will notice.
  • Timeline as a single date. One delivery date with no milestones means no verification points and no early warning when the schedule slips.

    • The lump-sum problem, stated plainly

    Lump-sum quotations are not always a trap; some are simply a shop’s habit. But the structure has a failure mode worth naming: with everything inside one number, every later disagreement — about steel, finish scope, trial depth, correction responsibility — has no document to appeal to. The conversation that resolves it is memory versus memory, and the shop holds more of the memories. Line items are not bureaucracy; they are the written agreement of what the number buys, and their absence shifts every dispute’s burden of proof to the buyer. The RFQ stage is where this gets fixed: request the itemization in the RFQ itself, so the quotations arrive in comparable form instead of arriving to be decomposed under time pressure.

    Comparing two quotations honestly

    1. Normalize the lines. Build a side-by-side with identical row names; a line one quotation omits is a finding, not a saving — mark it “not quoted” and price the question, not the silence.
    2. Align steel before price. Compare grade-to-grade: same cavity steel, same core steel, same base brand — only then is a price difference meaningful rather than a specification difference in disguise.
    3. Align finish scope. Same standard, same covered areas. A polish difference of one level on appearance faces can move more money than any concession on the table.
    4. Align trial and documentation counts. Two trials with reports versus one undocumented shot is a scope difference, not a price difference.
    5. Compare landed totals. Add exclusions back in — freight, gauges, spares, duties — and compare the total cost of owning the tool, not the list figure. This is where “competitive” quotations reveal what they competed on.

    What is usually excluded — and should be quoted anyway

    The exclusion list is where quotations go quiet, so make it speak first. These are the items most often left out of a base tool price — each is legitimate to exclude, and each costs multiples more to add after the fact than to line-item up front:

  • Texturing and special surface treatment. Pattern work is specialized and often subcontracted; it should appear as its own line with the pattern reference, not hide inside “finish.”
  • Gauges and checking fixtures. Sometimes the buyer owns gauging; sometimes the tool needs it. Either way the responsibility needs a line, or the gap appears at first-article time.
  • Export packaging and freight basis. Crate spec, insurance, Incoterms — the tool’s journey has a price and an owner; unnamed, both default upward.
  • Spare parts set. The consumables the program will need in year one; quoted with the tool, they cost parts prices — quoted after, they cost urgency.
  • Change-order basis. Not a price — a unit-rate structure for future modifications. The quotation that pre-agrees change-order rates is the one whose change orders stay boring.

    • I quote with the lines open on purpose. A buyer who can see the steel line can ask about the steel; a buyer who sees one number can only ask for the figure to come down — and the only place it can come down from is the very lines I just hid. The quotations I lose to lump sums sometimes sting for an afternoon. The lump-sum projects that arrive as rescue jobs sting the buyer for quarters. Read the lines. The lines are where the tool is real.

    — Arthur, Tooling Engineer at aCatMould

    Frequently asked questions

    Why do quotations for the same part vary so much between shops?

    Because they are quoting different tools: steel grades, base brands, action counts, finish levels, trial depth and documentation all vary — and so does what each shop quietly excluded. The spread is real information; line-by-line comparison is what turns it from noise into a map of whose tool you are actually buying.

    Is a higher quotation automatically the better tool?

    No — it is automatically the more expensive one. Higher price only means better when the lines behind it are stronger: better grades, deeper documentation, more included verification. A high lump sum is exactly as unverifiable as a low one.

    What if a shop refuses to itemize?

    Ask what the refusal protects. Some shops genuinely quote by experience and itemize on request; a flat refusal to show grades, counts and scopes is a signal about how the project’s later conversations will run. The DFM review is a lower-cost place to test a shop’s documentation habits than a full tool order is.

    How do I verify steel grades after the fact?

    Steel certificates with the shipment — mill certificates tied to the blocks in your tool — are the standard verification, and they cost a line item when quoted, not a dispute when requested later. Make “mill certs for cavity and core steels” a named line in the RFQ.

    Should I share my target price with the shops?

    A target price states a budget, not a scope — and shops adjust scope to meet budgets silently unless the scope is locked in lines. Share the target only after the itemized comparison exists, when a number can be discussed against visible scope instead of instead of it.

    What does “FOB” versus “DDP” change in the quotation?

    Where the buyer’s cost and risk begin: under FOB-style terms the buyer owns freight onward and imports the tool; under delivered terms the seller carries it to your door with duties. Neither is wrong — but the same tool quoted on different bases differs by more than freight, and comparisons must be on one basis or adjusted to it.

    Key takeaways

    1. A quotation is a set of engineering decisions with numbers attached; the line items are what you are actually buying.
    2. Every line needs a verifiable form: brand, grade, count, standard or scope — adjectives are not specifications.
    3. Steel per component, finish scope, trial counts and exclusions are the four lines where comparisons are won or lost.
    4. Lump sums shift every later dispute’s burden of proof to the buyer; itemization is the agreement, not the paperwork.
    5. Compare landed totals of aligned scopes — the list figure is a marketing decision, not a cost answer.

    If you are holding a quotation — or three — and want them read line by line against your part, send them with the drawing set and the resin. You will get a normalized comparison with the weak lines named and the silent exclusions priced, from a named engineer, before any money moves.

    Sources
    DME — global supplier of mold bases, components and hot runner systems
    HASCO — the pioneer of mouldmaking: standard mold units and components
    LKM (Lung Kee) — mould bases and mold steel for the toolmaking industry
    ISO 20457:2018 — Plastics moulded parts: Tolerances and acceptance conditions

    Sources: Plastics Technology · Plastics Technology Online · Society of Plastics Engineers (SPE) · MoldMaking Technology